linux-imx

/*

 * Copyright 2012 Freescale Semiconductor, Inc.

 *

 * The code contained herein is licensed under the GNU General Public

 * License. You may obtain a copy of the GNU General Public License

 * Version 2 or later at the following locations:

 *

 * http://www.opensource.org/licenses/gpl-license.html

 * http://www.gnu.org/copyleft/gpl.html

 */

​

#include <linux/clk/mxs.h>

#include <linux/clk.h>

#include <linux/clk-provider.h>

#include <linux/err.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include "clk.h"

​

static void __iomem *clkctrl;

static void __iomem *digctrl;

​

#define CLKCTRL clkctrl

#define DIGCTRL digctrl

​

#define PLLCTRL0        (CLKCTRL + 0x0000)

#define CPU         (CLKCTRL + 0x0020)

#define HBUS            (CLKCTRL + 0x0030)

#define XBUS            (CLKCTRL + 0x0040)

#define XTAL            (CLKCTRL + 0x0050)

#define PIX         (CLKCTRL + 0x0060)

#define SSP         (CLKCTRL + 0x0070)

#define GPMI            (CLKCTRL + 0x0080)

#define SPDIF           (CLKCTRL + 0x0090)

#define EMI         (CLKCTRL + 0x00a0)

#define SAIF            (CLKCTRL + 0x00c0)

#define TV          (CLKCTRL + 0x00d0)

#define ETM         (CLKCTRL + 0x00e0)

#define FRAC            (CLKCTRL + 0x00f0)

#define CLKSEQ          (CLKCTRL + 0x0110)

​

#define BP_CPU_INTERRUPT_WAIT   12

#define BP_CLKSEQ_BYPASS_SAIF   0

#define BP_CLKSEQ_BYPASS_SSP    5

#define BP_SAIF_DIV_FRAC_EN 16

#define BP_FRAC_IOFRAC      24

​

static void __init clk_misc_init(void)

{

    u32 val;

​

    /* Gate off cpu clock in WFI for power saving */

    writel_relaxed(1 << BP_CPU_INTERRUPT_WAIT, CPU + SET);

​

    /* Clear BYPASS for SAIF */

    writel_relaxed(1 << BP_CLKSEQ_BYPASS_SAIF, CLKSEQ + CLR);

​

    /* SAIF has to use frac div for functional operation */

    val = readl_relaxed(SAIF);

    val |= 1 << BP_SAIF_DIV_FRAC_EN;

    writel_relaxed(val, SAIF);